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18b144ea | 1 | /** @file\r |
2 | Multi-Processor support functions implementation.\r | |
3 | \r | |
d5203c10 | 4 | Copyright (c) 2010 - 2015, Intel Corporation. All rights reserved.<BR>\r |
18b144ea | 5 | This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php.\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include "DebugAgent.h"\r | |
16 | \r | |
4fe43eb3 | 17 | GLOBAL_REMOVE_IF_UNREFERENCED DEBUG_MP_CONTEXT volatile mDebugMpContext = {0,0,0,{0},{0},0,0,0,0,FALSE,FALSE};\r |
18b144ea | 18 | \r |
4fe43eb3 | 19 | GLOBAL_REMOVE_IF_UNREFERENCED DEBUG_CPU_DATA volatile mDebugCpuData = {0};\r |
18b144ea | 20 | \r |
21 | /**\r | |
b422b62c | 22 | Acquire a spin lock when Multi-processor supported.\r |
18b144ea | 23 | \r |
24 | It will block in the function if cannot get the access control.\r | |
b422b62c | 25 | If Multi-processor is not supported, return directly.\r |
26 | \r | |
27 | @param[in, out] MpSpinLock A pointer to the spin lock.\r | |
18b144ea | 28 | \r |
29 | **/\r | |
30 | VOID\r | |
b422b62c | 31 | AcquireMpSpinLock (\r |
32 | IN OUT SPIN_LOCK *MpSpinLock\r | |
18b144ea | 33 | )\r |
34 | {\r | |
b422b62c | 35 | if (!MultiProcessorDebugSupport()) {\r |
18b144ea | 36 | return;\r |
37 | }\r | |
38 | \r | |
39 | while (TRUE) {\r | |
b422b62c | 40 | if (AcquireSpinLockOrFail (MpSpinLock)) {\r |
18b144ea | 41 | break;\r |
42 | }\r | |
43 | CpuPause ();\r | |
44 | continue;\r | |
45 | }\r | |
46 | }\r | |
47 | \r | |
48 | /**\r | |
b422b62c | 49 | Release a spin lock when Multi-processor supported.\r |
18b144ea | 50 | \r |
b422b62c | 51 | @param[in, out] MpSpinLock A pointer to the spin lock.\r |
18b144ea | 52 | \r |
53 | **/\r | |
54 | VOID\r | |
b422b62c | 55 | ReleaseMpSpinLock (\r |
56 | IN OUT SPIN_LOCK *MpSpinLock\r | |
18b144ea | 57 | )\r |
58 | {\r | |
b422b62c | 59 | if (!MultiProcessorDebugSupport()) {\r |
60 | return;\r | |
18b144ea | 61 | }\r |
18b144ea | 62 | \r |
b422b62c | 63 | ReleaseSpinLock (MpSpinLock);\r |
18b144ea | 64 | }\r |
65 | \r | |
66 | /**\r | |
67 | Break the other processor by send IPI.\r | |
68 | \r | |
69 | @param[in] CurrentProcessorIndex Current processor index value.\r | |
70 | \r | |
71 | **/\r | |
72 | VOID\r | |
73 | HaltOtherProcessors (\r | |
74 | IN UINT32 CurrentProcessorIndex\r | |
75 | )\r | |
76 | {\r | |
93c0bdec | 77 | DebugAgentMsgPrint (DEBUG_AGENT_INFO, "processor[%x]:Try to halt other processors.\n", CurrentProcessorIndex);\r |
18b144ea | 78 | if (!IsBsp (CurrentProcessorIndex)) {\r |
79 | SetIpiSentByApFlag (TRUE);;\r | |
80 | }\r | |
81 | \r | |
82 | mDebugMpContext.BreakAtCpuIndex = CurrentProcessorIndex;\r | |
83 | \r | |
28c6c878 | 84 | //\r |
85 | // Set the debug viewpoint to the current breaking CPU.\r | |
86 | //\r | |
87 | SetDebugViewPoint (CurrentProcessorIndex);\r | |
88 | \r | |
18b144ea | 89 | //\r |
90 | // Send fixed IPI to other processors.\r | |
91 | //\r | |
92 | SendFixedIpiAllExcludingSelf (DEBUG_TIMER_VECTOR);\r | |
4fe43eb3 | 93 | \r |
18b144ea | 94 | }\r |
95 | \r | |
96 | /**\r | |
97 | Get the current processor's index.\r | |
98 | \r | |
99 | @return Processor index value.\r | |
100 | \r | |
101 | **/\r | |
102 | UINT32\r | |
103 | GetProcessorIndex (\r | |
104 | VOID\r | |
105 | )\r | |
106 | {\r | |
107 | UINT32 Index;\r | |
108 | UINT16 LocalApicID;\r | |
109 | \r | |
110 | LocalApicID = (UINT16) GetApicId ();\r | |
111 | \r | |
b422b62c | 112 | AcquireMpSpinLock (&mDebugMpContext.MpContextSpinLock);\r |
18b144ea | 113 | \r |
114 | for (Index = 0; Index < mDebugCpuData.CpuCount; Index ++) {\r | |
115 | if (mDebugCpuData.ApicID[Index] == LocalApicID) {\r | |
116 | break;\r | |
117 | }\r | |
118 | }\r | |
119 | \r | |
120 | if (Index == mDebugCpuData.CpuCount) {\r | |
121 | mDebugCpuData.ApicID[Index] = LocalApicID;\r | |
122 | mDebugCpuData.CpuCount ++ ;\r | |
123 | }\r | |
124 | \r | |
b422b62c | 125 | ReleaseMpSpinLock (&mDebugMpContext.MpContextSpinLock);\r |
18b144ea | 126 | \r |
127 | return Index;\r | |
128 | }\r | |
129 | \r | |
130 | /**\r | |
131 | Check if the specified processor is BSP or not.\r | |
132 | \r | |
133 | @param[in] ProcessorIndex Processor index value.\r | |
134 | \r | |
135 | @retval TRUE It is BSP.\r | |
136 | @retval FALSE It isn't BSP.\r | |
137 | \r | |
138 | **/\r | |
139 | BOOLEAN\r | |
140 | IsBsp (\r | |
d5203c10 | 141 | IN UINT32 ProcessorIndex\r |
18b144ea | 142 | )\r |
143 | {\r | |
d5203c10 MK |
144 | //\r |
145 | // If there are less than 2 CPUs detected, then the currently executing CPU\r | |
146 | // must be the BSP. This avoids an access to an MSR that may not be supported \r | |
147 | // on single core CPUs.\r | |
148 | //\r | |
149 | if (mDebugCpuData.CpuCount < 2) {\r | |
150 | return TRUE;\r | |
151 | }\r | |
152 | \r | |
18b144ea | 153 | if (AsmMsrBitFieldRead64 (MSR_IA32_APIC_BASE_ADDRESS, 8, 8) == 1) {\r |
154 | if (mDebugMpContext.BspIndex != ProcessorIndex) {\r | |
b422b62c | 155 | AcquireMpSpinLock (&mDebugMpContext.MpContextSpinLock);\r |
18b144ea | 156 | mDebugMpContext.BspIndex = ProcessorIndex;\r |
b422b62c | 157 | ReleaseMpSpinLock (&mDebugMpContext.MpContextSpinLock);\r |
18b144ea | 158 | }\r |
159 | return TRUE;\r | |
160 | } else {\r | |
161 | return FALSE;\r | |
162 | }\r | |
163 | }\r | |
164 | \r | |
165 | /**\r | |
166 | Set processor stop flag bitmask in MP context.\r | |
167 | \r | |
168 | @param[in] ProcessorIndex Processor index value.\r | |
169 | @param[in] StopFlag TRUE means set stop flag.\r | |
170 | FALSE means clean break flag.\r | |
171 | \r | |
172 | **/\r | |
173 | VOID\r | |
174 | SetCpuStopFlagByIndex (\r | |
175 | IN UINT32 ProcessorIndex,\r | |
176 | IN BOOLEAN StopFlag\r | |
177 | )\r | |
178 | {\r | |
179 | UINT8 Value;\r | |
180 | UINTN Index;\r | |
181 | \r | |
b422b62c | 182 | AcquireMpSpinLock (&mDebugMpContext.MpContextSpinLock);\r |
18b144ea | 183 | \r |
184 | Value = mDebugMpContext.CpuStopStatusMask[ProcessorIndex / 8];\r | |
185 | Index = ProcessorIndex % 8;\r | |
186 | if (StopFlag) {\r | |
187 | Value = BitFieldWrite8 (Value, Index, Index, 1);\r | |
188 | } else {\r | |
189 | Value = BitFieldWrite8 (Value, Index, Index, 0);\r | |
190 | }\r | |
191 | mDebugMpContext.CpuStopStatusMask[ProcessorIndex / 8] = Value;\r | |
192 | \r | |
b422b62c | 193 | ReleaseMpSpinLock (&mDebugMpContext.MpContextSpinLock);\r |
18b144ea | 194 | }\r |
195 | \r | |
196 | /**\r | |
197 | Set processor break flag bitmask in MP context.\r | |
198 | \r | |
199 | @param[in] ProcessorIndex Processor index value.\r | |
200 | @param[in] BreakFlag TRUE means set break flag.\r | |
201 | FALSE means clean break flag.\r | |
202 | \r | |
203 | **/\r | |
204 | VOID\r | |
205 | SetCpuBreakFlagByIndex (\r | |
206 | IN UINT32 ProcessorIndex,\r | |
207 | IN BOOLEAN BreakFlag\r | |
208 | )\r | |
209 | {\r | |
210 | UINT8 Value;\r | |
211 | UINTN Index;\r | |
212 | \r | |
b422b62c | 213 | AcquireMpSpinLock (&mDebugMpContext.MpContextSpinLock);\r |
18b144ea | 214 | \r |
215 | Value = mDebugMpContext.CpuBreakMask[ProcessorIndex / 8];\r | |
216 | Index = ProcessorIndex % 8;\r | |
217 | if (BreakFlag) {\r | |
218 | Value = BitFieldWrite8 (Value, Index, Index, 1);\r | |
219 | } else {\r | |
220 | Value = BitFieldWrite8 (Value, Index, Index, 0);\r | |
221 | }\r | |
222 | mDebugMpContext.CpuBreakMask[ProcessorIndex / 8] = Value;\r | |
223 | \r | |
b422b62c | 224 | ReleaseMpSpinLock (&mDebugMpContext.MpContextSpinLock);\r |
18b144ea | 225 | }\r |
226 | \r | |
227 | /**\r | |
228 | Check if processor is stopped already.\r | |
229 | \r | |
230 | @param[in] ProcessorIndex Processor index value.\r | |
231 | \r | |
232 | @retval TRUE Processor is stopped already.\r | |
233 | @retval TRUE Processor isn't stopped.\r | |
234 | \r | |
235 | **/\r | |
236 | BOOLEAN\r | |
237 | IsCpuStopped (\r | |
238 | IN UINT32 ProcessorIndex\r | |
239 | )\r | |
240 | {\r | |
241 | UINT8 CpuMask;\r | |
242 | \r | |
243 | CpuMask = (UINT8) (1 << (ProcessorIndex % 8));\r | |
244 | \r | |
245 | if ((mDebugMpContext.CpuStopStatusMask[ProcessorIndex / 8] & CpuMask) != 0) {\r | |
246 | return TRUE;\r | |
247 | } else {\r | |
248 | return FALSE;\r | |
249 | }\r | |
250 | }\r | |
251 | \r | |
252 | /**\r | |
253 | Set the run command flag.\r | |
254 | \r | |
255 | @param[in] RunningFlag TRUE means run command flag is set.\r | |
256 | FALSE means run command flag is cleared.\r | |
257 | \r | |
258 | **/\r | |
259 | VOID\r | |
260 | SetCpuRunningFlag (\r | |
261 | IN BOOLEAN RunningFlag\r | |
262 | )\r | |
263 | {\r | |
b422b62c | 264 | AcquireMpSpinLock (&mDebugMpContext.MpContextSpinLock);\r |
18b144ea | 265 | mDebugMpContext.RunCommandSet = RunningFlag;\r |
b422b62c | 266 | ReleaseMpSpinLock (&mDebugMpContext.MpContextSpinLock);\r |
18b144ea | 267 | }\r |
268 | \r | |
269 | /**\r | |
270 | Set the current view point to be debugged.\r | |
271 | \r | |
272 | @param[in] ProcessorIndex Processor index value.\r | |
273 | \r | |
274 | **/\r | |
275 | VOID\r | |
276 | SetDebugViewPoint (\r | |
277 | IN UINT32 ProcessorIndex\r | |
278 | )\r | |
279 | {\r | |
b422b62c | 280 | AcquireMpSpinLock (&mDebugMpContext.MpContextSpinLock);\r |
18b144ea | 281 | mDebugMpContext.ViewPointIndex = ProcessorIndex;\r |
b422b62c | 282 | ReleaseMpSpinLock (&mDebugMpContext.MpContextSpinLock);\r |
18b144ea | 283 | }\r |
284 | \r | |
285 | /**\r | |
93c0bdec | 286 | Set the IPI send by BPS/AP flag.\r |
18b144ea | 287 | \r |
288 | @param[in] IpiSentByApFlag TRUE means this IPI is sent by AP.\r | |
289 | FALSE means this IPI is sent by BSP.\r | |
290 | \r | |
291 | **/\r | |
292 | VOID\r | |
293 | SetIpiSentByApFlag (\r | |
294 | IN BOOLEAN IpiSentByApFlag\r | |
295 | )\r | |
296 | {\r | |
b422b62c | 297 | AcquireMpSpinLock (&mDebugMpContext.MpContextSpinLock);\r |
18b144ea | 298 | mDebugMpContext.IpiSentByAp = IpiSentByApFlag;\r |
b422b62c | 299 | ReleaseMpSpinLock (&mDebugMpContext.MpContextSpinLock);\r |
18b144ea | 300 | }\r |
301 | \r | |
302 | /**\r | |
93c0bdec | 303 | Check the next pending breaking CPU.\r |
18b144ea | 304 | \r |
305 | @retval others There is at least one processor broken, the minimum\r | |
306 | index number of Processor returned.\r | |
307 | @retval -1 No any processor broken.\r | |
308 | \r | |
309 | **/\r | |
310 | UINT32\r | |
93c0bdec | 311 | FindNextPendingBreakCpu (\r |
18b144ea | 312 | VOID\r |
313 | )\r | |
314 | {\r | |
315 | UINT32 Index;\r | |
4fe43eb3 | 316 | \r |
18b144ea | 317 | for (Index = 0; Index < DEBUG_CPU_MAX_COUNT / 8; Index ++) {\r |
318 | if (mDebugMpContext.CpuBreakMask[Index] != 0) {\r | |
319 | return (UINT32) LowBitSet32 (mDebugMpContext.CpuBreakMask[Index]) + Index * 8;\r | |
320 | }\r | |
321 | }\r | |
322 | return (UINT32)-1;\r | |
323 | }\r | |
4fe43eb3 | 324 | \r |
18b144ea | 325 | /**\r |
326 | Check if all processors are in running status.\r | |
327 | \r | |
328 | @retval TRUE All processors run.\r | |
329 | @retval FALSE At least one processor does not run.\r | |
330 | \r | |
331 | **/\r | |
332 | BOOLEAN\r | |
333 | IsAllCpuRunning (\r | |
334 | VOID\r | |
335 | )\r | |
336 | {\r | |
337 | UINTN Index;\r | |
4fe43eb3 | 338 | \r |
18b144ea | 339 | for (Index = 0; Index < DEBUG_CPU_MAX_COUNT / 8; Index ++) {\r |
340 | if (mDebugMpContext.CpuStopStatusMask[Index] != 0) {\r | |
341 | return FALSE;\r | |
342 | }\r | |
343 | }\r | |
344 | return TRUE;\r | |
345 | }\r | |
346 | \r | |
93c0bdec | 347 | /**\r |
348 | Check if the current processor is the first breaking processor.\r | |
349 | \r | |
4fe43eb3 JF |
350 | If yes, halt other processors.\r |
351 | \r | |
93c0bdec | 352 | @param[in] ProcessorIndex Processor index value.\r |
4fe43eb3 | 353 | \r |
93c0bdec | 354 | @return TRUE This processor is the first breaking processor.\r |
355 | @return FALSE This processor is not the first breaking processor.\r | |
4fe43eb3 | 356 | \r |
93c0bdec | 357 | **/\r |
358 | BOOLEAN\r | |
359 | IsFirstBreakProcessor (\r | |
360 | IN UINT32 ProcessorIndex\r | |
361 | )\r | |
362 | {\r | |
b422b62c | 363 | if (MultiProcessorDebugSupport()) {\r |
93c0bdec | 364 | if (mDebugMpContext.BreakAtCpuIndex != (UINT32) -1) {\r |
365 | //\r | |
366 | // The current processor is not the first breaking one.\r | |
367 | //\r | |
368 | SetCpuBreakFlagByIndex (ProcessorIndex, TRUE);\r | |
369 | return FALSE;\r | |
370 | } else {\r | |
371 | //\r | |
372 | // If no any processor breaks, try to halt other processors\r | |
373 | //\r | |
374 | HaltOtherProcessors (ProcessorIndex);\r | |
375 | return TRUE;\r | |
376 | }\r | |
377 | }\r | |
378 | return TRUE;\r | |
4fe43eb3 | 379 | }\r |
93c0bdec | 380 | \r |